Improvement in grate-bars



UNITED STATES PATENT OFFICE.

RICHARD MONTGOMERY, OF NEW'A YORK, (N. Y.

IMPROVEMENT IN GRATE-BARS.

Specification forming part of Letters Patent N0. 57,358, dated ngust 21,1866.

To all whom it may concern:

Beit known that I, RICHARD MONTGOM- ERY, of the city and county of NewYork, in the State of New York, have invented a new and usefulImprovement in Gratelars for Furnaces; and I do` hereby declare thefollowing to be a t'ull and exact description thereof, reference beinghad to the annexed drawings, forming a part ot' this specieation.

The nature ot' my invention consists in making a gratebar with a centralsolid plate, from which corrugated plates extend laterally, so as togive a more free access of air to the fuel, or, as it is commonlycalled, a greater breathing surface, and consequently, as .these sheetsor corrugated plates are much thinner than a solid bar, they will bekept cooler by the air passing through them to the tire or combustible.

It also consists in the mode of connecting these corrugated sheets orplates at or near their outer extremities, to give them greater rigidityand also in arranging their outer extremities so that, when desired, theextremities of two or more ot' these portions ot' the bar may be made tolock into and give additional support to each other.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction.

Figure 1 is a top or plan view of one of my improved gratebars. Fig. 2is a vertical or side view. Fig. 3 is a vertical sectional View,

showing the lateral connections between a central and two side bars.Fig. 4 is a view of the manner ot' connecting the lateral corrugatedplates or sheets near their outer extremities, being a modification ofthe mode shown in Fig. l.

In all these iigures like letters refer to like parts.

In Fig. 1, Ais the central rib ofthe bar, extending from the abutment Bat one end ot' the furnace to b at the other. This rib is also shown inFigs. 3 and 4. To give additional strength to this rib it is projecteddownward into the ash-pit, as shown at a a, Figs. 2 and 3. From eachside or face of this rib thereis produced the timbriated plates orsheets C C, so corrugated as to leave air-spaces or breathing -passagesbetween them. These sheets or plates are about the same depth from topto bottom, as seen in Figs. 2 and 3, as the central rib, to enable themto sustain the weight of the fuel piled upon them in the furnace, and tooffer sufficient surface to the air ascending to the tire to keep themat a comparatively low temperature. By this arrangement I am enabled toprevent the heating of the thick grate-bars in connnon use. Besidesgiving additional strength to these timbriated plates or sheets O O bygiving them a corrugated form, this configuration greatly increases thearea of the air-passages to the lire, thus enabling the same area otgrate-surface to consume more fuel in the same time than is produced onan ordinary grate, or, what is equivalent thereto, enabling a smallergrate to produce as much efficiency as a larger one with less injury tothe gratebar.

When one, two, or even three bars only are required to form the entiregrate-surface, these imbriated plates may be connected together at theirextremities, as shown in Fig. l; but when a greater number is requiredfor this purpose I prefer to construct and connect them at their outerextremities, as seen at Figs. 3 and 4. In these figures it will be seenthat these plates, instead of being united at their extremities, as inFig. 1, have no connection with each other at this point, but have anopen tube interposed and connecting them together at a short distancefrom their extremities, as seen at d d, Fig. 4. The extremities of theplates, being thus left free, are notched, as seen -at e e, Fig. 3,which enables the bars to support each other, at least to some extent,and thereby to continue the uniformity of the plane ot' the entiregrate.

Having thus fully described my invention, what I claim therein, anddesire to secure by Letters Patent of the United States, is-

1. The lnbriated corrugated plates or sheets O C, projecting from thesides of the bar A, constructed and arranged substantially as described.

2. Thehollow tubes d d, in combination with the corrugated iimbriatedplates O O, substantially in the manner and for the purpose set forth.

3. The notches c e, in combination with the plates or sheets O C,substantially as described.

RICHARD MONTGOMERY.

Witnesses:

H. KING, JACOB J oNEs.

